I'm not sure that I understand. Because an investigative scam accusation was brought up about a company that hired @zapo to run a bounty campaign, you are leaving this unrelated signature campaign?

I highly doubt that @zapo would continue to work with a shady business if, in fact, the allegations of fraudulent or scammy tactics are brought to light about the company in review. You might want to wait for an outcome in the future, rather than jumping the gun about an open allegation.

If morality is an issue, then the reaction of how @zapo handles the situation should be worth far more than you choosing to leave this unrelated campaign because of an accusation.

Just my opinion.